It's called the Nike Total 90 Aerow II. I remember seeing a different ball being used in the pictures from a closed door friendly between Arsenal and Brighton back in March, but I didn't know what it was until now.
Then I was browsing around on soccer.com today, and I found the new balls.
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235333
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235288
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235161
Nike Total 90 Aerow II
Nike Total 90 Aerow II Premiership
Then I was browsing around on soccer.com today, and I found the new balls.
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235333
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235288
http://www.soccer.com/IWCatProductPage.process?Merchant_Id=1&Section_Id=50&pcount=&Product_Id=235161
Nike Total 90 Aerow II
Nike Total 90 Aerow II Premiership